mc68hc908sr12 Freescale Semiconductor, Inc, mc68hc908sr12 Datasheet - Page 48

• Manufacturer Part Number: mc68hc908sr12
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Memory Map
Data Sheet
48
Addr.
$0000
$0001
$0002
$0003
$0004
$0005
$0006
$0007
$0008
$0009
Data Direction Register A
Data Direction Register B
Data Direction Register C
Data Direction Register D
Register Name
Port A Data Register
Port B Data Register
Port C Data Register
Port D Data Register
Unimplemented
Unimplemented
U = Unaffected
Figure 2-2. Control, Status, and Data Registers (Sheet 1 of 12)
(DDRC)
(DDRD)
(DDRA)
(DDRB)
(PTC)
(PTD)
(PTA)
(PTB)
Reset:
Reset:
Reset:
Reset:
Reset:
Reset:
Reset:
Reset:
Reset:
Reset:
Read:
Write:
Read:
Write:
Read:
Write:
Read:
Write:
Read:
Write:
Read:
Write:
Read:
Write:
Read:
Write:
Read:
Write:
Read:
Write:
X = Indeterminate
DDRC7
DDRD7
DDRA7
PTA7
PTC7
PTD7
Bit 7
U
U
U
0
0
0
0
0
0
0
DDRA6
DDRB6
DDRC6
DDRD6
PTC6
PTD6
PTA6
PTB6
U
U
U
U
6
0
0
0
0
Memory Map
DDRA5
DDRB5
DDRC5
DDRD5
PTC5
PTD5
PTA5
PTB5
U
U
U
U
5
0
0
0
0
MC68HC908SR12•MC68HC08SR12 — Rev. 5.0
= Unimplemented
DDRA4
DDRB4
DDRC4
DDRD4
PTA4
PTB4
PTC4
PTD4
U
U
U
U
4
0
0
0
0
DDRA3
DDRB3
DDRC3
DDRD3
PTA3
PTB3
PTC3
PTD3
U
U
U
U
3
0
0
0
0
DDRC2
DDRD2
DDRA2
DDRB2
PTA2
PTB2
PTC2
PTD2
Freescale Semiconductor
U
U
U
U
R
2
0
0
0
0
= Reserved
DDRC1
DDRD1
DDRA1
DDRB1
PTA1
PTB1
PTC1
PTD1
U
U
U
U
1
0
0
0
0
DDRA0
DDRB0
DDRC0
DDRD0
PTB0
PTC0
PTD0
PTA0
Bit 0
U
U
U
U
0
0
0
0